This is a captivating lepidopteran species belonging to the family Riodinidae, recognized by its delicate yet striking appearance and a wingspan measuring between 30 and 38 millimeters. The dorsal surface of the wings is predominantly dark brown or charcoal black, bisected by a prominent and bright white or pale cream postdiscal band on the forewings. The hindwings feature subtle but beautiful marginal markings in shades of reddish-orange, accompanied by metallic, reflective spots near the anal angle that sparkle under direct sunlight. The ventral side of the wings mirrors this pattern with a softer, lighter coloration and more pronounced iridescent silvery scales. Its long, slender antennae are distinctly ringed in black and white, ending in a well-developed club.
Geographical distribution: This insect is native to the Neotropical realm of South America. Its geographic range is concentrated in the southern and southeastern regions of Brazil (including states such as Rio de Janeiro, São Paulo, Paraná, Santa Catarina, and Rio Grande do Sul), extending into eastern Paraguay, northeastern Argentina (primarily within the province of Misiones), and northern parts of Uruguay.
Habitat: It is closely associated with the Atlantic Forest biome and semi-deciduous transition forests. The species is commonly found along forest edges, wooded trails, sunlit clearings, and riparian corridors. It thrives in low to medium vegetation layers where sunlight can penetrate the canopy, encouraging the growth of the herbaceous plants and shrubs necessary for its survival and development.
Feeding: As an adult, this butterfly is primarily nectarivorous, frequently visiting the flowers of families like Asteraceae and Verbenaceae to extract essential sugars. It also engages in mud-puddling, a behavior where it aggregates on damp soil, wet mud, or decaying organic matter to absorb dissolved minerals and moisture. The caterpillars are specialist herbivores, feeding selectively on the foliage of host plants, particularly those in the Celastraceae family (such as Maytenus species).
Behavior: It exhibits strictly diurnal activity, with peak flight times coinciding with the warmest, sunniest hours of the day. Males are highly territorial and utilize a perching strategy, resting on the upper surface of leaves at heights ranging from 1 to 2.5 meters above the forest floor. From these vantage points, they actively patrol their territory, chasing off competing males and scanning for potential mates. Their flight pattern is incredibly fast, erratic, and low to the ground, making them difficult to track.
Reproduction: The reproductive cycle begins when a fertilized female deposits her eggs singly on the underside of the host plant´s leaves. The eggs are hemispherical and pale in color. Upon hatching, the larvae progress through several developmental instars, feeding on leaf tissue. Before pupation, the mature caterpillar spins a silken girdle to secure itself to a stem or twig, forming a chrysalis. In this pupal stage, the tissues undergo complete metamorphosis, culminating in the emergence of the adult butterfly.
Conservation status: The species is currently classified as Not Evaluated on the global IUCN Red List. Nevertheless, localized populations face pressure from habitat fragmentation and deforestation within the Atlantic Forest. The loss of pristine native woodlands to agricultural expansion and urbanization remains a constant threat to the survival of its specific larval host plants.
Compilation and publication: EcoRegistros – 21/08/2026